Trigger matplotlib font cache generation

keras3-cpu/Dockerfile

@@ -165,6 +165,7 @@ RUN chown -R ${NB_USER} "/home/${NB_USER}/.jupyter" && \
     mkdir -p /etc/skel/.local/share/ && \
     cp -r "/home/${NB_USER}/.local/share/code-server" /etc/skel/.local/share/ && \
     # matplotlib cache
+    python -c "import matplotlib.pyplot" && \
     mkdir -p /etc/skel/.cache && \
     cp -r "/home/${NB_USER}/.cache/matplotlib" /etc/skel/.cache/ && \
     # stuff

keras3-gpu/Dockerfile

@@ -125,6 +125,7 @@ RUN chown -R ${NB_USER} "/home/${NB_USER}/.jupyter" && \
     mkdir -p /etc/skel/.local/share/ && \
     cp -r "/home/${NB_USER}/.local/share/code-server" /etc/skel/.local/share/ && \
     # matplotlib cache
+    python -c "import matplotlib.pyplot" && \
     mkdir -p /etc/skel/.cache && \
     cp -r "/home/${NB_USER}/.cache/matplotlib" /etc/skel/.cache/ && \
     # stuff

pytorch-gpu/Dockerfile

@@ -124,6 +124,7 @@ RUN chown -R ${NB_USER} "/home/${NB_USER}/.jupyter" && \
     mkdir -p /etc/skel/.local/share/ && \
     cp -r "/home/${NB_USER}/.local/share/code-server" /etc/skel/.local/share/ && \
     # matplotlib cache
+    python -c "import matplotlib.pyplot" && \
     mkdir -p /etc/skel/.cache && \
     cp -r "/home/${NB_USER}/.cache/matplotlib" /etc/skel/.cache/ && \
     # stuff